Receiving apparatus and method

Abstract

A receiving apparatus for receiving signals in a transmission system transmitted based on a frame structure including signaling data and payload data. The receiving apparatus includes a receiver configured to receive a transmission signal, a frame demapper configured to demap signaling data blocks and payload data patterns from the frames of the frame structure of the received transmission signal, wherein a signaling data block is assumed to include a number of data corresponding to a number of a signaling data pattern, wherein the signaling data patterns are split into n signaling data portions, n being a positive integer, in which n signaling portions are mapped onto n or less frames, and a demodulation decoder is configured to separately demodulate and decode the signaling data blocks and payload data patterns to obtain signaling data and payload data.

The invention claimed is: 
     
       1. A receiving apparatus for receiving signals in a transmission system, said signals being transmitted on the basis of a frame structure, the frames of said frame structure comprising signaling data and payload data, said receiving apparatus comprising:
 a receiver configured to receive a transmission signal, 
 a frame demapper configured to demap signaling data blocks and payload data patterns from the frames of said frame structure of said received transmission signal, wherein a signaling data block includes signaling data portions of a signaling data pattern and wherein signaling data patterns are split into n signaling data portions, n being a positive integer and wherein n signaling data portions are mapped onto n or less frames, and 
 a demodulation decoder configured to separately demodulate and decode said signaling data blocks and payload data patterns to obtain signaling data and payload data, wherein said demodulation decoder comprises a signaling data demodulation decoder configured to demodulate and decode said signaling data blocks by 
 determining the number n from said signaling blocks by performing a correlation of the data included in one or more signaling data blocks with a correlation sequence, the correlation sequence by which the signaling data have been modulated before transmission, and 
 decoding n signaling portions included in the signaling blocks from which n has been determined. 
 
     
     
       2. The receiving apparatus as claimed in  claim 1 ,
 wherein said signaling data demodulation decoder is configured to iteratively determine the number n from said signaling blocks by first performing a correlation of the data included in a first number of signaling data blocks with said correlation sequence, checking for the presence of a correlation peak and iteratively increasing the number of signaling data blocks with which the correlation is performed until a correlation peak is detected. 
 
     
     
       3. The receiving apparatus as claimed in  claim 1 ,
 wherein said signaling data demodulation decoder is configured to iteratively determine the number n from said signaling blocks by first performing a correlation of the data included in a single signaling data block with the correlation sequence, checking for the presence of a correlation peak and iteratively increasing the number of signaling data blocks, with which the correlation is performed until a correlation peak is detected, by a small number, in particular by one or two. 
 
     
     
       4. The receiving apparatus as claimed in  claim 1 ,
 wherein said signaling data demodulation decoder comprises 
 i) a demodulation unit configured to demodulate encoded signaling data included in one or more signaling data blocks and to output the demodulated signaling data on a first path and on a second path having a different phase than the first path, 
 ii) a sorting unit provided on the first path and configured to sort the demodulated signaling data, 
 iii) a combining unit provided on the first path and configured to combine said demodulated signaling data of the second path with said resorted signaling data, 
 iv) a correlation unit configured to correlate said combined signaling data with said correlation sequence, 
 v) a detection unit configured to determine the value of n, and 
 vi) a decoding unit configured to decode said n signaling portions included in the signaling blocks from which n has been determined. 
 
     
     
       5. The receiving apparatus as claimed in  claim 4 ,
 wherein said decoding unit comprises 
 a) a selection and reordering unit configured to select the n signaling data portions included in the signaling blocks from which n has been determined and to arrange them in the correct sequence to form said signaling data pattern, 
 b) a decoder demodulation unit configured to demodulate said signaling data pattern and to output the demodulated signaling data on a first decoder path and on a second decoder path having a different phase than the first decoder path, 
 c) a decoder decorrelation unit provided on the first decoder path and configured to decorrelate said demodulated signaling data with said correlation sequence, 
 d) a decoder sorting unit provided on the first decoder path and configured to sort the decorrelated signaling data, 
 e) a decoder combining unit configured to combine said demodulated signaling data of the second path with said decorrelated signaling data, and 
 f) a signaling data decoding unit configured to decode said n signaling portions included in the combined signaling data based on a predetermined code, based on which the signaling data have been encoded before transmission. 
 
     
     
       6. The receiving apparatus as claimed in  claim 1 ,
 wherein said signaling data demodulation decoder further comprises an unshifting unit configured to shift, in particular to cyclically shift, the n signaling portions included in the signaling blocks from which n has been determined by a shift factor, which has been used for shifting cells of said signaling data patterns before transmission. 
 
     
     
       7. The receiving apparatus as claimed in  claim 6 ,
 wherein said unshifting unit is configured to shift the L cells of said n signaling portions included in the signaling blocks from which n has been determined by a shift factor in the range between 0 and L/n or a multiple thereof, in particular by a shift factor of L/(2n). 
 
     
     
       8. The receiving apparatus as claimed in  claim 7 ,
 wherein said unshifting unit is configured to shift the L cells of said n signaling data portions included in the signaling blocks from which n has been determined by a shift factor of L/(2n) or an odd multiple thereof. 
 
     
     
       9. The receiving apparatus as claimed in  claim 4 ,
 wherein said sorting unit is configured to shift the bits of the demodulated signaling data by a sorting factor corresponding to the resorting factor used in a transmitting apparatus for sorting the bits the bits of encoded signaling data. 
 
     
     
       10. The receiving apparatus as claimed in  claim 9 ,
 wherein said sorting unit is configured to shift the bits of the demodulated signaling data by a sorting factor of m bits, m being a positive integer, in particular by a sorting factor of m=1 or m=2. 
 
     
     
       11. The receiving apparatus as claimed in  claim 5 ,
 wherein said decoder sorting unit is configured to shift the bits of the decorrelated signaling data by a sorting factor corresponding to the resorting factor used in a transmitting apparatus for sorting the bits the bits of encoded signaling data. 
 
     
     
       12. The receiving apparatus as claimed in  claim 11 ,
 wherein said sorting unit is configured to shift the bits of the decorrelated signaling data by a sorting factor of m bits, m being a positive integer, in particular by a sorting factor of m=1 or m=2. 
 
     
     
       13. The receiving apparatus as claimed in  claim 4 ,
 wherein said correlation unit and said decoder decorrelation unit are configured to use a stored correlation sequence or a correlation sequence calculated based on a predetermined rule. 
 
     
     
       14. The receiving apparatus as claimed in  claim 4 ,
 wherein said correlation unit and said decoder decorrelation unit are configured to use a correlation sequence having the same or smaller length than said encoded signaling data. 
 
     
     
       15. The receiving apparatus as claimed in  claim 1 ,
 wherein said frame demapper is configured to demap signaling data blocks and payload data patterns from the frames of said frame structure, wherein the signaling data include L1-pre signaling data and L1-post signaling data including L1-config signaling data and wherein the encoded and modulated L1-pre signaling data are split into n L1-pre signaling data portions and/or the encoded and modulated L1-config signaling data are split into n L1-config signaling data portions. 
 
     
     
       16. The receiving apparatus as claimed in  claim 1 ,
 wherein said frame demapper is configured to demap said signaling data blocks and payload data patterns from the n or more frames of a super-frame of the frame structure. 
 
     
     
       17. The receiving apparatus as claimed in  claim 1 ,
 wherein said receiving apparatus is configured for receiving signals in a multi-carrier communication system, in particular an OFDM-based broadcast system. 
 
     
     
       18. The receiving apparatus as claimed in  claim 4 ,
 wherein said first path and/or said first decoder path is a quadrature phase path, Q-path, and wherein said second path and/or said second decoder path is an inphase path, I-path. 
 
     
     
       19. The receiving apparatus as claimed in  claim 1 ,
 further comprising an inverse transformer configured to transform said received transmission signal from the time domain into the frequency domain to generate a frequency domain transmission signal for processing by said frame demapper. 
 
     
     
       20. A receiving method for receiving signals in a transmission system, said signals being transmitted on the basis of a frame structure, the frames of said frame structure comprising signaling data and payload data, said receiving method comprising:
 receiving a transmission signal, 
 demapping signaling data blocks and payload data patterns from the frames of said frame structure of said received transmission signal, wherein a signaling data block includes signaling data portions of a signaling data pattern and wherein signaling data patterns are split into n signaling data portions, n being a positive integer and wherein n signaling portions are mapped onto n or less frames, and 
 separately demodulating and decoding said signaling data blocks and payload data patterns to obtain signaling data and payload data, including 
 determining the number n from said signaling blocks by performing a correlation of the data included in one or more signaling data blocks with a correlation sequence, the correlation sequence by which the signaling data have been modulated before transmission, and 
 decoding n signaling portions included in the signaling blocks from which n has been determined.